JSAUX USB Data Blocker, (4-Pack) USB A Defender Only for Quick Charge, Protect Against Juice Jacking, Refuse Hacking Provide Safe Charging- Red

These work perfectly. Great for travel protection. I’ve been using them daily for months with no issues. I’ll definitely buy more for coworkers.

Gives you a worry free charge for your devices. No way to get malware or bugs on your device, since no data is swapped. Easy to use and gives you confidence to charge anywhere. Just don't plug it into a strange charging station and forget it and loose it. Always be mindful that you are plugged into this device. Great way to keep your devices safe from viruses and malware. I do highly recommend this adapter.

Well, these definitely work as advertised. After a number of tests, data is completely disabled. This will affect the charging speed of a number of devices, as their quick-charge protocols cannot be detected, but that's an expected tradeoff when securely connecting to public power supplies. The build quality is decent, though the only minor issue is that the USB A plug does fit a little snug and requires a tiny bit more force to insert / remove. Still, great little data blocker plugs for the price.

Perfect! Note: Don't get discouraged when you first use it. Plugging your cord or device into the port blocker is a very snug fit. They're so snug that i almost thought I'd have to return them. The price is great. Does exactly what they're supposed to do and i know this isn't a really big deal but the red is really pretty!

These have worked well for me. The charging speed is good, and it is easy to use. I use these at hotels, on airplanes, and when I don't want my phone to transfer data to a rental car. It won't charge as fast as it does when using a regular USB A cable. Apparently, that is a limitation of all data blockers. But for the added protection, I can live with that.

Metal case sturdy, fast charging with no data connection.

I don’t yet know if these do what they’re supposed to, but if not, I’ll amend this review

This is one of the things that you cannot tell if it does anything for you or not. We can only hope that it does not allow data to either get into my phone or date to leave my phone when I charge it.